Heterospilus fuscexilis spec. nov. is described from England and Sweden. A key to the macropterous European species with the ovipositor sheath projecting not more than half the length of the metasoma and having subbasal sculpture on the third-fifth tergites is added. Heterospilus testaceus Telenga, 1941, is synonymised with H. cephi Rohwer, 1925, the synonymy of H. basifurcatus Fischer, 1960, with the latter is accepted, and H. rubicundus Fischer, 1960, is considered to be a valid species.